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Casting from PC to Roku lets you watch videos, display photos, or mirror your computer on a TV without moving files to a USB drive. The best method depends on whether you use Windows or macOS, whether your Roku supports screen mirroring, and whether you want to show your entire desktop or only stream media.
Casting From PC to Roku on Windows
Most modern Roku TVs and Roku streaming players support screen mirroring through Miracast. This feature sends your Windows desktop wirelessly to the TV, including compatible videos, presentations, websites, and photos.
Before starting, connect both devices to the same Wi-Fi network. Then check that screen mirroring is enabled on the Roku:
- Press the Home button on the Roku remote.
- Open Settings.
- Select System, then Screen mirroring.
- Choose Prompt or Allow.
The Prompt option asks for permission whenever a device connects. Allow accepts compatible devices automatically.
On a Windows 10 or Windows 11 PC:
- Press Windows + K to open the wireless display panel.
- Select your Roku device from the list.
- Approve the connection on your Roku if prompted.
You can also open Settings > System > Display > Multiple displays > Connect to a wireless display, depending on your Windows version and graphics driver.
Once connected, Windows normally duplicates your computer screen. To change this, press Windows + P and choose Duplicate, Extend, or Second screen only. Duplicate is useful for watching or presenting content, while Extend lets you use the TV as an additional monitor.
Not every Windows computer supports Miracast. Compatibility depends on the computer’s Wi-Fi adapter, graphics hardware, drivers, and Windows configuration. If your Roku does not appear in the wireless display list, update Windows and your graphics and wireless drivers before trying again.
Casting From PC to Roku on a Mac
Mac computers do not generally use Miracast in the same way Windows PCs do. Instead, compatible Roku TVs and players support Apple AirPlay 2.
To use AirPlay, your Mac and Roku must be connected to the same network. On the Roku, go to Settings > Apple AirPlay and HomeKit and turn AirPlay on. Some older Roku models may not support AirPlay, so check your model and Roku OS version if the setting is missing.
On a Mac running a recent version of macOS:
- Open Control Center in the menu bar.
- Select Screen Mirroring.
- Choose your Roku device.
- Enter the code shown on the TV if requested.
You can also use the AirPlay icon inside supported apps to send only a video or photo rather than mirroring the entire Mac screen. App-based AirPlay usually provides smoother playback and lets you continue using the computer privately.
If the Roku does not appear, confirm that AirPlay is enabled, both devices are on the same Wi-Fi network, and your Mac and Roku software are updated. Guest networks, VPNs, and router features that isolate wireless devices can prevent discovery.
How to Stream Videos Without Mirroring
Screen mirroring is convenient, but it is not always the best way to watch movies or television. The computer must remain active, and notifications, browser tabs, or cursor movement may appear on the TV. For personal media, a dedicated streaming method is often more reliable.
One option is to install a media server such as Plex on your computer. Plex organizes video, music, and photo files and provides a Roku app for playback. Install Plex Media Server on the PC, add your media folders, and then install the Plex channel from the Roku Channel Store. Both devices need network access, but the files can stay on the computer.
Roku Media Player can also play compatible files from a USB drive or supported network locations. File format support varies, so some videos may need to be converted first.
For online video, check whether the service has an official Roku app. Netflix, YouTube, Disney+, Prime Video, and many other platforms offer Roku channels. Using the native Roku app generally gives better quality and fewer interruptions than mirroring a browser window. It may also support features such as subtitles, 4K playback, and surround sound more consistently.
A Chrome browser cannot normally cast directly to Roku using Google Cast because Roku is not a Chromecast receiver. If a website offers an AirPlay button, Mac users may be able to use it. Otherwise, use Windows screen mirroring, a compatible Roku app, or an HDMI connection.
Fix Common Casting Problems
If casting from PC to Roku fails, start with the network. The PC and Roku should be on the same local network, not merely connected to the same internet service. Avoid guest Wi-Fi, which often blocks communication between devices. Temporarily disconnecting a VPN can also help.
Restart the Roku, computer, and router. Then check for updates under Settings > System > Software update on the Roku and install pending Windows or macOS updates.
For Windows, verify that Screen mirroring is enabled on the Roku and that the PC supports Miracast. If the connection is delayed or unstable, move the computer and Roku closer to the router or use a less congested 5 GHz Wi-Fi network. High-resolution video and crowded wireless networks can cause stuttering.
For AirPlay, make sure AirPlay is turned on and review the Roku’s access settings. If available, set Require Code to require a code only the first time or whenever a device connects. Restarting AirPlay from the Roku settings can refresh device discovery.
Picture quality may improve if you lower the PC’s display resolution or close demanding applications. For gaming, video editing, or dependable 4K playback, an HDMI cable is usually better than wireless mirroring because it provides lower latency and a more stable connection.
FAQ: Casting From PC to Roku
Can I cast a Chrome tab from my PC directly to Roku?
Usually not through Google Cast. Roku devices are not standard Chromecast receivers. You can mirror a Windows screen, use AirPlay from a compatible Mac, install a Roku version of the streaming service, or connect the PC with HDMI.
Why does my Roku not appear when I press Windows + K?
Your PC may not support Miracast, the Roku screen-mirroring setting may be disabled, or the devices may be on different networks. Update your wireless and graphics drivers, enable screen mirroring on Roku, and disable VPN or guest-network connections.
Can I cast from a PC to Roku without Wi-Fi?
Wireless casting generally requires a functioning local network. For a connection that does not depend on Wi-Fi, connect the PC directly to the TV with an HDMI cable. Some Roku models may support limited device connections, but HDMI is the most dependable option.
Conclusion
Casting from PC to Roku is easiest with Windows screen mirroring or AirPlay from a compatible Mac. For regular movie and TV playback, a Roku app or Plex server is usually smoother than mirroring. If wireless connections remain unreliable, HDMI provides the simplest and most stable alternative.
